# JiveBird vs SleepEngine

The clearest difference is update cadence: JiveBird at every 6 days against SleepEngine's monthly. JiveBird also leads on review sentiment (89% vs 80%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JiveBird ships an update every 6 days, SleepEngine monthly. The most recent releases landed on September 28, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | JiveBird | SleepEngine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/jivebird/id946644356/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **88.9% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | Free | Free |
| Size | 64 MB | 78 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [JiveBird Ltd](https://appshunter.io/developer/1258601208) | [Cambridge Sleep Sciences Ltd](https://appshunter.io/developer/1622392022) |

## What reviewers say

### JiveBird

[App page](https://appshunter.io/ios/app/jivebird/id946644356)

Create and send personalized digital messages instantly or schedule them for future delivery. This app makes thoughtful gifting quick and easy, taking less than two minutes to send a meaningful message, perfect for special occasions like Christmas.

**Highlights:** Send messages instantly, Schedule message delivery, Create messages in under 2 minutes, Optional digital gift voucher, Personalized gifting

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### SleepEngine

[App page](https://appshunter.io/ios/app/sleepengine/id6736406638)

This app uses scientifically developed sound technology to help improve sleep quality. It guides your brain through healthy sleep cycles, aiding in falling asleep faster, staying asleep longer, and waking up refreshed. Designed to retrain natural sleep patterns, it offers personalized sleep programs for a better night's rest.

**Highlights:** Scientific sound technology, Guides brain through sleep cycles, Helps fall asleep faster, Reduces waking times, Personalized sleep programs, Bluetooth connectivity to SmartPillow

**In-app purchases:** none


## Frequently asked questions

### Is JiveBird free?

JiveBird is free to download, with no in-app purchases.

### Is SleepEngine free?

SleepEngine is free to download, with no in-app purchases.

### Do JiveBird or SleepEngine have ads?

Neither JiveBird nor SleepEngine shows ads.

### Which is updated more often, JiveBird or SleepEngine?

JiveBird ships an update every 6 days, and SleepEngine monthly. Most recently, JiveBird was updated on September 28, 2026 and SleepEngine on July 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*